Titanium Tubes: Grade:GR1,GR2,GR5(Ti6AL4V),GR7,GR12 Standard:ASTM AMSE Outer Dia:4mm~320mm, L< 15m Wall Thickness:0. ... Titanium Tubes: Grade:GR1,GR2,GR5(Ti6AL4V),GR7,GR12 Standard:ASTM Outer Dia:4mm~320mm, L< 15m Wall Thickness:0.4 ... titanium alloys because of its comprehensive mechanical, physical and chemical properties. Alloy grade 7, add little palladium in cp titanium and ...